Belt-gearing for drill-presses



'1. G. HEY.

BELT BEARING FOR DRILL PRESSES.

APPLICATION FILED JULY l2. 1917.

Patented Dec. 28, 1920.

2 SHEETS-SHEET 1.

J. G. HE-Y.

'BELT GEARING AFOR DRILL PRESSES.

APPLlcAxoN FILED iuLY 12, 1917.

1,363,786. Patented Dec. 28, 1920.

. y 2 SHEETS-SHEET 2. ff Z' 46 @l 3 zy 1 J9 g PJ134- i 20 4/5 Z 7 42 I 2f' 40 39 34 Jrwznj?? `vTOEN` G. HEYLOF CINCINNATI, OHIO.

BELT-GEARING FOR DRILL-PRESSES.

To all whom z' may concern: x

Be it knownthat I, J oHN Gr. HEY, a citizen of the United States, and a resident of Cincinnati, county of Hamilton, and State of Ohio, have invented certain new and useful Improvements in Belt- Gearing for Drill-Presses.

The invention relates to belt gearing for drill presses and like machines and seeks to provide a simple, effective construction which can be readily adjusted to operate the drill spindle at different speeds. The invention consists in the features of improvement hereinafter set forth, illustratedin the preferred form in the accompanying drawlngs and more particularly pointed out in the appended claims.

In the drawings, Figure l is an elevation of the upper portion of a drilling machine embodying the present invention, parts of .the frame being broken away for the sake of clearness. Fig. 2 is a plan view and Fig. 3 is an enlarged detail section on the line 3-3 of Fig. 1. i

The machine frame comprises a base portion (not shown) of anysuitable construction and an upwardly projecting hollow pedestal or standard 1. At its upper end, the standard is provided with forwardly projecting portions 2 and 3 having suitable bearings 4 and 5, for a vertical hollow shaft or sleeve 6. A pulley 7 is mounted on the sleeve shaft 6 between the bearings 4 and 5 and is pref? erably in the form of a multiple-stepped cone pulley, that shown havingl two steps.

The wheel vspindle 8 is keyed to and is longitudinally movable through the sleeve shaft,6 and is provided with the usual spindle'sleeve 9 and tool holder 10. The sleeve 9 is vertically movable through a supporting bracket 11 which is adjustably clamped in the usual manner to a guide 12 upon the front of the-pedestal or standard 1 of the machine frame.- A feed shaft 13 mounted on the bracket 11 isv provided, as usual, with a pinion engaging a rack upon the sleeve 9.

The latter is connected by a chain 14 to a counter-balancing weight 15 within the hollow pedestal orl standard. -The parts thus far described may be of any usual or desired construction. I

Means are provided for operating the driven, shaft or tool spindle through the medium of a belt, the means being readilyl adjustable to operate the driven shaft or tool y Specification of Letters Patent. .Application ined` July 12, 1917. serial No.

Patented Dec. 28, 1920. 180,060.

spindle at different speeds and, inthe preferred embodiment of the invention, the drive belt connects the tool spindle to a parallel or vertically disposed motor shaft.

In the preferred construction shown, the upper portion of the pedestal is provided with a rearwardly projecting rectangular vbracket cast integral therewith and comprising side portions 16 and front and rear end portions 17 and 18. The vertical driving or motor shaft 19 is carried lipon an adjustable support which comprises upper and lower rectangular plates or members 20 and 21 which are connected together and arranged to' slide upon horizontal guides or ways 22 formed lpon the portions 16 of the main frame. refer-ably, these guides or ways are provided with horizontal upper faces and inclined lower faces and the adjustable supporting members 20 and 21 are provided with corresponding faces engaging the same. The members 20 and 21 are provided with sleeve-like central portions 23` and 24 which fit, one within the other, as most plainly shown in Fig. 3 and the two members are connected by a series 0f four bolts 25 arranged about the central' hub portions. Preferably, as shown, these bolts are provided with adjusting and locking nuts 26 and 27 at their upper ends so that lost motion and wear between the guiding faces can be taken up.

The driving or motor shaft 19 is prefer- Y ably journaled lin suitable ball-bearings 28 arranged in the upper and lower ends respectively of the sleeves 23 and 24 and the upper end of the shaft is .journaled in a ball bearing 29 mounted in the upper end of a bracket 30 which rises from the forward portion of the supporting member-20. In the form shown, the motor casing comprises a main portion 31 and a cap portion 32 bolted thereto. As shown, the cap portion 32 is formed integral with the sleeve portion 24 of the supporting member 21 and strengthening ribs 33 extend between the parts 21,

'24 and 32.

and preferably the driving pulley 34, is longitudinally bring anyone of the steps thereon in line ywith any one of the steps of the driven pulley so that any of the steps on one wheel can be connected to any of the steps on the other to drive the spindle at different speeds. In the preferred construction shown, the driving wheel 34 is keyed to and is vertically adjustable on the driving or motor shaft 19. As shown, the pulley is connected by a vertical key 36 to the shaft so as to rotate therewith and be vertically adjustable thereon. It is held in adjusted position by the spring-held ball 38 which is arranged to engage any one of the series of conical sockets 39 formed in the shaft. The ball is ar-. ranged in a socket 40 in the pulley and a spring 41 extends between the ball and a plug 42 threaded into the outer end of the socket. A

It is obvious that the driving pulley 34 can be vertically adjusted so that any one of the steps thereon lcan be brought into line with either of the steps on the driven pulley 7.

To adjust the tension of the belt 35 when the latter connects steps of different sizes on the driving or driven pulleys, the support for the driving shaft and motor is adjusted upon the bracket members 16 of the main frame. For this purpose a screw shaft 43 is journaled in the front and rear end portions 17 and 18 of the frame bracket adjacent the inner face ofone of the side portions 16`y thereof. This screw shaft extends loosely through an opening in one of the webs 33 and is threaded .through a sleeve o r nut 44 formed upon ya part 45 that depends from the supporting member 20. The shaft 43 is provided at its rear and front ends with hand wheels 46 and 47 by which it can be rotated to adjust the connected supporting members 20 and 21 and thereby laterally adjust the driven shaft 19 bodily to and from the driven shaft or tool spindle.

With the mechanism described, the belt 35 may connect any one of the steps of the driving wheel to either of the steps ofthe driven pulley and can be placed under the desired amount of tension to properly drive the tool spindle. With the construction shown in which one pulley is provided with three steps and theV other with two, the driven shaft or spindle can be operated at siX` different speeds. Q

If it is desired, the pulley on the driving shaft can be fixed and that on the drivenshaft adjustable. It is also obvious that numerous other changes can be made in the details set forth without departure from the essentialsof the invention, as defined in the claims.

I claim as my invention 1.' In a direct, variable speed drive mechanism for drilling machines, the combina- Y iin@ with weave@ tion with a machine frame and a vertical drill spindle mounted thereon, of a supportshiftably mounted on the rear of said frame, a vertical drive shaft and an operating motor therefor mounted on said support, pulleys on said shaft and'said spindle, one at least of said pulleys having a series of steps and one of said pulleys being vertically adjustable to bring said steps into operation, a belt connecting said pulleys, and

spindle, stepped cone pulleys on said shaft and said spindle, a belt connecting said pulleys, one of the latter beinglongitudinally adjustable to bring any one of the' steps thereof into operative relation with any one of the steps of the other pulley, and means' for adjusting said driving shaft laterally to tension the belt.l f

3. In drive mechanism, the combination of parallel driving and driven' shafts, pulleys thereon, each of said pulleys having a plurality of steps and one being adjustable to brinor any one ofthe steps thereof into any one of the steps of the" other pulley. 'a belt connecting said pulleys, and

'means for laterally adjusting one of said shafts to tension the belt.

4. In a. direct, variable speed drive mechanism for drilling machines, the combination of an upright frame having a rearwardly projectingbracket, a vertical spindle shaft journaled at the front of the main frame, a support horizontally slidable on said bracket, a vertical drive shaft and an operating motor therefor mounted onsaid sup: port,pulleys on said shafts, one at least'jof said pulleys having a plurality ofvsteps and n one' being adjustable vertically to bring said f steps into operation, a belt for connecting any one of said steps to the other of said pulleys, and a horizontal screw for adjusting said support to tension the belt and for holding the support in adjusted position.

5. In a direct, variable speed drive mecha-4 nism for machines of the class described, thecombination with the `machine frame, of parallel driving and driven shafts, pulleys thereon, one having a plurality of steps and one being adjustable to bring said steps into operation, a belt connectin said pulleys, a motor connected to said rivingshaft, a support for'said motor andsaid driving shaft shiftably mounted on the machine frame, and means for adjusting said support at right angles to said shafts to tension the belt.

6. In a direct, variable speed drive mechanism for drilling machines, the combination with a machine frame and a vertical drill spindle mounted thereon, of a support shiftably mounted on said frame, a motor, a vertical motor shaft mounted on said suppwt, multiple stepped pulleys on said shaft and said spindle, said pulleys being relatively adjustable to bring any one of the steps of one pulley into line with any one of the steps of the other, a belt connecting said pulleys, and means for adjusting said support to tension the belt.

7. In direct, variable speed driving mechanism for machines of the class described, the combination with the machine frame of parallel driving and driven shafts, of multiple-stepped pulleys on said shafts, one being longitudinally adjustable, a belt for connecting any one of the steps of one pulley to any one of the steps of the other, a motor connected to said driving shaft, a support for said motor and said driving shaft shiftably mounted on the machine frame, and

y means for adjusting said support to move said driving shaft laterally and tension the be t.

8. In drive mechanism for drill presses, the combination 'of an upright frame having a rearwardly projecting bracket, a vert-ical spindle slr-aft journaled at the front of the main frame, a support horizontally slidable on said bracket, amotor and a vertical driving shaft mounted on said support, pulleys on said shafts, a belt for connecting said pulleys, and means for adjusting said support to tension the belt.

9. In drive mechanism for drill presses,-

the combination of anupright frame having f a rearwardly projecting bracket, a vertica spindle shaft journaled at the frontv of the main frame, a support horizontally slidable on said bracket, a motor and a vertical driving shaft mounted on said support, pulleys on said shafts, one atleast having a plurality of steps and one being adjust-able to bringl said steps, into operation, a belt for connecting any one of said steps to the other of said pulleys, and means for adjusting said support to tension the belt.

l0. In drive mechanism for drill presses,

the combination of an upright frame having a rearwardly projecting bracket provided with `comprising upper and lower connected members engaging said guides, a motor mounted on the lower supporting member, a vertical motor shaft journaled on said supporting members, a vertical spindle shaft journaled at the front of the upright frame, pulleys on the upper portions of said shafts, a belt connecting said pulleys, and a horizontal screw journaled on said bracket for adjusting said connected members and the parts carried thereby to tension the belt.

k1l. In driving mechanism, the combination of parallel driving and driven shafts, of multiple stepped pulleys on said shafts, the large and small steps of said pulleys 65 `being at corresponding ends thereof, and one of said pulleys being longitudinally adjustable to bring any one of its steps into line with any one of the steps of the other pulley, a belt connecting said pulleys, and

horizontal guides, a support 50 means for laterally adjusting one of said shafts to tension the belt.

l2. In drive mechanism for drill presses,

the combination of an upright 'main frame having a rearwardly projecting bracket, a vertical spindle shaft journaled at the front of the main frame, a support longitudinally adjustable on said bracket, a motor and a .vert-ical motor shaftI mounted on said support, multiple stepped pulleysfon said shafts, y having the larger steps thereof at their lower ends, one at least of said pulleysbeing longitudinally adjustable to bring any one of the steps thereof into line with any of the steps of the other pulley, a belt connnect'ing said pulleys, and means for adjusting said support to tension the belt.

lJQHN G. HEY. 

